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106 lines
4.3 KiB
C++
106 lines
4.3 KiB
C++
/*M///////////////////////////////////////////////////////////////////////////////////////
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//
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// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
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//
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// By downloading, copying, installing or using the software you agree to this license.
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// If you do not agree to this license, do not download, install,
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// copy or use the software.
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//
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//
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// License Agreement
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// For Open Source Computer Vision Library
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//
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// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
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// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
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// Third party copyrights are property of their respective owners.
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//
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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//
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// * Redistribution's of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// * Redistribution's in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// * The name of the copyright holders may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// This software is provided by the copyright holders and contributors "as is" and
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// any express or implied warranties, including, but not limited to, the implied
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// warranties of merchantability and fitness for a particular purpose are disclaimed.
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// In no event shall the Intel Corporation or contributors be liable for any direct,
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// indirect, incidental, special, exemplary, or consequential damages
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// (including, but not limited to, procurement of substitute goods or services;
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// loss of use, data, or profits; or business interruption) however caused
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// and on any theory of liability, whether in contract, strict liability,
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// or tort (including negligence or otherwise) arising in any way out of
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// the use of this software, even if advised of the possibility of such damage.
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//
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//M*/
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#include "precomp.hpp"
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namespace cv { namespace gpu { namespace device
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{
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namespace hough
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{
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void linesAccum_gpu(DevMem2Db src, PtrStep_<uint> accum, float theta, int numangle, int numrho, float irho);
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int linesGetResult_gpu(DevMem2D_<uint> accum, float2* out, int* voices, int maxSize, float threshold, float theta, float rho, bool doSort);
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}
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}}}
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void cv::gpu::HoughLinesTransform(const GpuMat& src, GpuMat& accum, float rho, float theta)
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{
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using namespace cv::gpu::device;
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CV_Assert(src.type() == CV_8UC1);
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const int numangle = cvRound(CV_PI / theta);
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const int numrho = cvRound(((src.cols + src.rows) * 2 + 1) / rho);
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const float irho = 1.0f / rho;
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accum.create(numangle + 2, numrho + 2, CV_32SC1);
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accum.setTo(cv::Scalar::all(0));
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hough::linesAccum_gpu(src, accum, theta, numangle, numrho, irho);
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}
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void cv::gpu::HoughLinesGet(const GpuMat& accum, GpuMat& lines, float rho, float theta, int threshold, bool doSort, int maxLines)
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{
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using namespace cv::gpu::device;
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CV_Assert(accum.type() == CV_32SC1);
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lines.create(2, maxLines, CV_32FC2);
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lines.cols = hough::linesGetResult_gpu(accum, lines.ptr<float2>(0), lines.ptr<int>(1), maxLines, threshold, theta, rho, doSort);
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}
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void cv::gpu::HoughLines(const GpuMat& src, GpuMat& lines, float rho, float theta, int threshold, bool doSort, int maxLines)
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{
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cv::gpu::GpuMat accum;
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HoughLines(src, lines, accum, rho, theta, threshold, doSort, maxLines);
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}
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void cv::gpu::HoughLines(const GpuMat& src, GpuMat& lines, GpuMat& accum, float rho, float theta, int threshold, bool doSort, int maxLines)
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{
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HoughLinesTransform(src, accum, rho, theta);
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HoughLinesGet(accum, lines, rho, theta, threshold, doSort, maxLines);
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}
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void cv::gpu::HoughLinesDownload(const GpuMat& d_lines, OutputArray h_lines_, OutputArray h_voices_)
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{
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h_lines_.create(1, d_lines.cols, CV_32FC2);
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cv::Mat h_lines = h_lines_.getMat();
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d_lines.row(0).download(h_lines);
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if (h_voices_.needed())
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{
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h_voices_.create(1, d_lines.cols, CV_32SC1);
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cv::Mat h_voices = h_voices_.getMat();
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cv::gpu::GpuMat d_voices(1, d_lines.cols, CV_32SC1, const_cast<int*>(d_lines.ptr<int>(1)));
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d_voices.download(h_voices);
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}
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}
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